Recently I have read The Lessons by Naomi Alderman which I thought was a good book, it's about a guy who goes to Oxford uni and is pretty miserable until he gets introduced to a cool social circle dominated by a rich gay guy called Mark, and various things happen around Mark's charming but destructive personality. I thought it was well written and I carried on thinking about the characters after I'd finished the book, thinking "IF ONLY he had done this instead of going off with Mark" etc. I enjoyed it.
Now I'm reading Lasting Damage by Sophie Hannah but only part way through that.
From a different genre, an underrated short book that I like is A Very British Coup by Christopher Mullin, this is set in the 1980s where a very left wing Labour Prime Minister, Harry Perkins, has been elected, to the horror of various elements of the 'establishment' (and the Americans), and so the 'establishment' sets to work trying to bring him down, but in a 'very British' way.